From 37ecc7b1278f4184a6869504f7074b4a54f112c5 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Wed, 27 Jan 2016 07:07:24 -0200 Subject: [media] em28xx: add media controller support Add the needed bits to make em28xx to create a media controller graph. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/em28xx/em28xx-video.c | 294 +++++++++++++++++++++++++++++++- 1 file changed, 287 insertions(+), 7 deletions(-) (limited to 'drivers/media/usb/em28xx/em28xx-video.c') diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c index 86db1e1f8ab5..16a2d4039330 100644 --- a/drivers/media/usb/em28xx/em28xx-video.c +++ b/drivers/media/usb/em28xx/em28xx-video.c @@ -866,6 +866,275 @@ static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) em28xx_videodbg("res: put %d\n", res_type); } +static void em28xx_v4l2_media_release(struct em28xx *dev) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + int i; + + for (i = 0; i < MAX_EM28XX_INPUT; i++) { + if (!INPUT(i)->type) + return; + media_device_unregister_entity(&dev->input_ent[i]); + } +#endif +} + +/* + * Media Controller helper functions + */ + +static int em28xx_v4l2_create_media_graph(struct em28xx *dev) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct media_device *mdev = dev->media_dev; + struct media_entity *entity; + struct media_entity *if_vid = NULL, *if_aud = NULL; + struct media_entity *tuner = NULL, *decoder = NULL; + int i, ret; + + if (!mdev) + return 0; + + /* Webcams are really simple */ + if (dev->board.is_webcam) { + media_device_for_each_entity(entity, mdev) { + if (entity->function != MEDIA_ENT_F_CAM_SENSOR) + continue; + ret = media_create_pad_link(entity, 0, + &v4l2->vdev.entity, 0, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + } + return 0; + } + + /* Non-webcams have analog TV decoder and other complexities */ + + media_device_for_each_entity(entity, mdev) { + switch (entity->function) { + case MEDIA_ENT_F_IF_VID_DECODER: + if_vid = entity; + break; + case MEDIA_ENT_F_IF_AUD_DECODER: + if_aud = entity; + break; + case MEDIA_ENT_F_TUNER: + tuner = entity; + break; + case MEDIA_ENT_F_ATV_DECODER: + decoder = entity; + break; + } + } + + /* Analog setup, using tuner as a link */ + + /* Something bad happened! */ + if (!decoder) + return -EINVAL; + + if (tuner) { + if (if_vid) { + ret = media_create_pad_link(tuner, TUNER_PAD_OUTPUT, + if_vid, + IF_VID_DEC_PAD_IF_INPUT, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + ret = media_create_pad_link(if_vid, IF_VID_DEC_PAD_OUT, + decoder, DEMOD_PAD_IF_INPUT, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + } else { + ret = media_create_pad_link(tuner, TUNER_PAD_OUTPUT, + decoder, DEMOD_PAD_IF_INPUT, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + } + + if (if_aud) { + ret = media_create_pad_link(tuner, TUNER_PAD_AUD_OUT, + if_aud, + IF_AUD_DEC_PAD_IF_INPUT, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + } else { + if_aud = tuner; + } + + } + ret = media_create_pad_link(decoder, DEMOD_PAD_VID_OUT, + &v4l2->vdev.entity, 0, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + + if (em28xx_vbi_supported(dev)) { + ret = media_create_pad_link(decoder, DEMOD_PAD_VBI_OUT, + &v4l2->vbi_dev.entity, 0, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + } + + for (i = 0; i < MAX_EM28XX_INPUT; i++) { + struct media_entity *ent = &dev->input_ent[i]; + + if (!INPUT(i)->type) + break; + + switch (INPUT(i)->type) { + case EM28XX_VMUX_COMPOSITE: + case EM28XX_VMUX_SVIDEO: + ret = media_create_pad_link(ent, 0, decoder, + DEMOD_PAD_IF_INPUT, 0); + if (ret) + return ret; + break; + default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */ + if (!tuner) + break; + + ret = media_create_pad_link(ent, 0, tuner, + TUNER_PAD_RF_INPUT, + MEDIA_LNK_FL_ENABLED); + if (ret) + return ret; + break; + } + } +#endif + return 0; +} + +static int em28xx_enable_analog_tuner(struct em28xx *dev) +{ +#ifdef CONFIG_MEDIA_CONTROLLER + struct media_device *mdev = dev->media_dev; + struct em28xx_v4l2 *v4l2 = dev->v4l2; + struct media_entity *source; + struct media_link *link, *found_link = NULL; + int ret, active_links = 0; + + if (!mdev || !v4l2->decoder) + return 0; + + /* + * This will find the tuner that is connected into the decoder. + * Technically, this is not 100% correct, as the device may be + * using an analog input instead of the tuner. However, as we can't + * do DVB streaming while the DMA engine is being used for V4L2, + * this should be enough for the actual needs. + */ + list_for_each_entry(link, &v4l2->decoder->links, list) { + if (link->sink->entity == v4l2->decoder) { + found_link = link; + if (link->flags & MEDIA_LNK_FL_ENABLED) + active_links++; + break; + } + } + + if (active_links == 1 || !found_link) + return 0; + + source = found_link->source->entity; + list_for_each_entry(link, &source->links, list) { + struct media_entity *sink; + int flags = 0; + + sink = link->sink->entity; + + if (sink == v4l2->decoder) + flags = MEDIA_LNK_FL_ENABLED; + + ret = media_entity_setup_link(link, flags); + if (ret) { + pr_err("Couldn't change link %s->%s to %s. Error %d\n", + source->name, sink->name, + flags ? "enabled" : "disabled", + ret); + return ret; + } else + em28xx_videodbg("link %s->%s was %s\n", + source->name, sink->name, + flags ? "ENABLED" : "disabled"); + } +#endif + return 0; +} + +static const char * const iname[] = { + [EM28XX_VMUX_COMPOSITE] = "Composite", + [EM28XX_VMUX_SVIDEO] = "S-Video", + [EM28XX_VMUX_TELEVISION] = "Television", + [EM28XX_RADIO] = "Radio", +}; + +static void em28xx_v4l2_create_entities(struct em28xx *dev) +{ +#if defined(CONFIG_MEDIA_CONTROLLER) + struct em28xx_v4l2 *v4l2 = dev->v4l2; + int ret, i; + + /* Initialize Video, VBI and Radio pads */ + v4l2->video_pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad); + if (ret < 0) + pr_err("failed to initialize video media entity!\n"); + + if (em28xx_vbi_supported(dev)) { + v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1, + &v4l2->vbi_pad); + if (ret < 0) + pr_err("failed to initialize vbi media entity!\n"); + } + + /* Webcams don't have input connectors */ + if (dev->board.is_webcam) + return; + + /* Create entities for each input connector */ + for (i = 0; i < MAX_EM28XX_INPUT; i++) { + struct media_entity *ent = &dev->input_ent[i]; + + if (!INPUT(i)->type) + break; + + ent->name = iname[INPUT(i)->type]; + ent->flags = MEDIA_ENT_FL_CONNECTOR; + dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE; + + switch (INPUT(i)->type) { + case EM28XX_VMUX_COMPOSITE: + ent->function = MEDIA_ENT_F_CONN_COMPOSITE; + break; + case EM28XX_VMUX_SVIDEO: + ent->function = MEDIA_ENT_F_CONN_SVIDEO; + break; + default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */ + ent->function = MEDIA_ENT_F_CONN_RF; + break; + } + + ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]); + if (ret < 0) + pr_err("failed to initialize input pad[%d]!\n", i); + + ret = media_device_register_entity(dev->media_dev, ent); + if (ret < 0) + pr_err("failed to register input entity %d!\n", i); + } +#endif +} + + /* ------------------------------------------------------------------ Videobuf2 operations ------------------------------------------------------------------*/ @@ -883,6 +1152,9 @@ static int queue_setup(struct vb2_queue *vq, return sizes[0] < size ? -EINVAL : 0; *nplanes = 1; sizes[0] = size; + + em28xx_enable_analog_tuner(dev); + return 0; } @@ -1453,13 +1725,6 @@ static int vidioc_s_parm(struct file *file, void *priv, 0, video, s_parm, p); } -static const char * const iname[] = { - [EM28XX_VMUX_COMPOSITE] = "Composite", - [EM28XX_VMUX_SVIDEO] = "S-Video", - [EM28XX_VMUX_TELEVISION] = "Television", - [EM28XX_RADIO] = "Radio", -}; - static int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *i) { @@ -1974,6 +2239,8 @@ static int em28xx_v4l2_fini(struct em28xx *dev) em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); + em28xx_v4l2_media_release(dev); + if (video_is_registered(&v4l2->radio_dev)) { em28xx_info("V4L2 device %s deregistered\n", video_device_node_name(&v4l2->radio_dev)); @@ -2297,6 +2564,9 @@ static int em28xx_v4l2_init(struct em28xx *dev) v4l2->dev = dev; dev->v4l2 = v4l2; +#ifdef CONFIG_MEDIA_CONTROLLER + v4l2->v4l2_dev.mdev = dev->media_dev; +#endif ret = v4l2_device_register(&dev->udev->dev, &v4l2->v4l2_dev); if (ret < 0) { em28xx_errdev("Call to v4l2_device_register() failed!\n"); @@ -2569,6 +2839,16 @@ static int em28xx_v4l2_init(struct em28xx *dev) video_device_node_name(&v4l2->radio_dev)); } + /* Init entities at the Media Controller */ + em28xx_v4l2_create_entities(dev); + + ret = em28xx_v4l2_create_media_graph(dev); + if (ret) { + em28xx_errdev("failed to create media graph\n"); + em28xx_v4l2_media_release(dev); + goto unregister_dev; + } + em28xx_info("V4L2 video device registered as %s\n", video_device_node_name(&v4l2->vdev)); -- cgit v1.2.1